Rebel filmmaking, as some call it, is based on the idea that you are going to make do with less resources so that you maintain an integral freedom in your work. Through this you will often have to scrounge together resources, crew members, and technology wherever you can get it. This can mean that you will have to be able to use any camera given to you and jump on whatever computer happens to have non-linear editing software. At no point in this should you set a standard that will then limit your ability to work spontaneously with available resources. This is exactly what employing high definition would do.